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Surely the biggest quadcopter of all time was the Piasecki PA-97 Helistat, which connected four medium transport helicopters.
It worked about as well as you’d expect. http://www.youtube.com/watch?v=_7jENWKgMPY
Comment by Bob D — July 17, 2011 @ 12:30 pm
The PA-67-Helistate was not a quad copter, it was a BLIMP propelled by four helicopters. Big difference, the lift came from Helium.
The idiots that designed it should have used computer modeling, maybe they would have found the resonant vibration that destroyed it (much like a very infamous bridge).
Comment by K Scharf — July 17, 2011 @ 2:05 pm
who let kanye in here?
Comment by matt — July 17, 2011 @ 2:45 pm
from the pics, all of the props are going to rotate the same way. the will be inherent stability issues(gyroscopic rotation)
the successful units have two pairs of counter-rotating props to counter this.
Comment by sqkybeaver — July 17, 2011 @ 4:29 pm
Hi sqkybeaver,
Each fan is mounted on a servo controlled trunnion oriented such that there is a few degrees of thrust vectoring available in the tangential axis. This is the mechanism through which the torque of the fans is canceled.
Ideally, it will also assist in translation and rotation. We’ll see.
Comment by ChArLeSg — July 17, 2011 @ 10:58 pm